This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A247053 #18 Jan 24 2019 15:45:45 %S A247053 1,1,3,10,44,295,3136,42784,642104,10246149,173647330 %N A247053 Number of endofunctions on [n] that are the 6th power of an endofunction. %e A247053 a(3) = 10: (1,1,1), (1,1,3), (1,2,1), (1,2,2), (1,2,3), (1,3,3), (2,2,2), (2,2,3), (3,2,3), (3,3,3). %Y A247053 Column k=6 of A247026. %K A247053 nonn,more %O A247053 0,3 %A A247053 _Alois P. Heinz_, Sep 10 2014 %E A247053 Offset corrected by _Vincenzo Librandi_, Sep 11 2014 %E A247053 a(8) from _Alois P. Heinz_, Sep 26 2014 %E A247053 a(9)-a(10) from _Bert Dobbelaere_, Jan 24 2019